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#ifndef __MM_KASAN_KASAN_H
#define __MM_KASAN_KASAN_H
#include <linux/kasan.h>
#include <linux/stackdepot.h>
#define KASAN_SHADOW_SCALE_SIZE (1UL << KASAN_SHADOW_SCALE_SHIFT)
#define KASAN_SHADOW_MASK (KASAN_SHADOW_SCALE_SIZE - 1)
#define KASAN_FREE_PAGE 0xFF /* page was freed */
#define KASAN_PAGE_REDZONE 0xFE /* redzone for kmalloc_large allocations */
#define KASAN_KMALLOC_REDZONE 0xFC /* redzone inside slub object */
#define KASAN_KMALLOC_FREE 0xFB /* object was freed (kmem_cache_free/kfree) */
#define KASAN_GLOBAL_REDZONE 0xFA /* redzone for global variable */
/*
* Stack redzone shadow values
* (Those are compiler's ABI, don't change them)
*/
#define KASAN_STACK_LEFT 0xF1
#define KASAN_STACK_MID 0xF2
#define KASAN_STACK_RIGHT 0xF3
#define KASAN_STACK_PARTIAL 0xF4
/* Don't break randconfig/all*config builds */
#ifndef KASAN_ABI_VERSION
#define KASAN_ABI_VERSION 1
#endif
struct kasan_access_info {
const void *access_addr;
const void *first_bad_addr;
size_t access_size;
bool is_write;
unsigned long ip;
};
/* The layout of struct dictated by compiler */
struct kasan_source_location {
const char *filename;
int line_no;
int column_no;
};
/* The layout of struct dictated by compiler */
struct kasan_global {
const void *beg; /* Address of the beginning of the global variable. */
size_t size; /* Size of the global variable. */
size_t size_with_redzone; /* Size of the variable + size of the red zone. 32 bytes aligned */
const void *name;
const void *module_name; /* Name of the module where the global variable is declared. */
unsigned long has_dynamic_init; /* This needed for C++ */
#if KASAN_ABI_VERSION >= 4
struct kasan_source_location *location;
#endif
};
/**
* Structures to keep alloc and free tracks *
*/
enum kasan_state {
KASAN_STATE_INIT,
KASAN_STATE_ALLOC,
KASAN_STATE_QUARANTINE,
KASAN_STATE_FREE
};
#define KASAN_STACK_DEPTH 64
struct kasan_track {
u32 pid;
depot_stack_handle_t stack;
};
struct kasan_alloc_meta {
struct kasan_track track;
u32 state : 2; /* enum kasan_state */
u32 alloc_size : 30;
};
struct qlist_node {
struct qlist_node *next;
};
struct kasan_free_meta {
/* This field is used while the object is in the quarantine.
* Otherwise it might be used for the allocator freelist.
*/
struct qlist_node quarantine_link;
struct kasan_track track;
};
struct kasan_alloc_meta *get_alloc_info(struct kmem_cache *cache,
const void *object);
struct kasan_free_meta *get_free_info(struct kmem_cache *cache,
const void *object);
static inline const void *kasan_shadow_to_mem(const void *shadow_addr)
{
return (void *)(((unsigned long)shadow_addr - KASAN_SHADOW_OFFSET)
<< KASAN_SHADOW_SCALE_SHIFT);
}
static inline bool kasan_report_enabled(void)
{
return !current->kasan_depth;
}
void kasan_report(unsigned long addr, size_t size,
bool is_write, unsigned long ip);
#ifdef CONFIG_SLAB
void quarantine_put(struct kasan_free_meta *info, struct kmem_cache *cache);
void quarantine_reduce(void);
void quarantine_remove_cache(struct kmem_cache *cache);
#else
static inline void quarantine_put(struct kasan_free_meta *info,
struct kmem_cache *cache) { }
static inline void quarantine_reduce(void) { }
static inline void quarantine_remove_cache(struct kmem_cache *cache) { }
#endif
#endif
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